Portable onboard vehicular hoist systems

ABSTRACT

Portable vehicular hoist systems include a truss assembly having a joist member with forward and rearward ends, a pair of rafter members each having upper and lower ends, and a forward connection assembly for connecting the upper ends of the rafter members to the forward end of the joist member to allow for relative pivotal articulated movements therebetween. The rafter members may thus be pivotally moved between a stowed condition wherein the rafter members are oriented generally parallel to the joist member and an operative position wherein the rafter members extend downwardly and laterally outwardly from the joist member. A hoist assembly may be provided so as to be connectable to the joist member of the truss assembly to be supported thereby. The rearward end of the joist member and the lower ends of the rafter members may be removably attached to respective connection lugs rigidly fixed to a vehicle&#39;s structure, e.g., an aircraft fuselage at an opening therein.

FIELD

The disclosed embodiments herein relate to onboard vehicular hoist systems especially adapted for use in the loading and unloading of cargo, baggage, equipment and like material into and out of an aircraft fuselage, respectively. In especially preferred embodiments, the portable onboard hoist systems may be removably associated with an aircraft so as to assist in the loading and unloading cargo and the like therefrom.

BACKGROUND

As is well known, it is typically necessary for relative heavy cargo, baggage, equipment and like material (hereinafter more simply referred to collectively as “cargo”) to be loaded and unloaded from the interior of an aircraft fuselage. In order to accomplish this task, there is sometimes provided ground-based cargo handling equipment, including hoists, which will assist an aircraft operator in the loading/unloading of cargo. However, there also exists a need for the aircraft to be provided with onboard cargo handling equipment in the event that ground-based equipment is unavailable (e.g., that may occur in remote airport facilities and/or landing sites).

Several onboard hoist systems are known in the art as exemplified by U.S. Pat. Nos. 3,552,587 to Warren, 4,858,855 to Dalbera, and 6,496,610 to Spitsbergen, the entire contents of each being expressly incorporated hereinto by reference. In this regard, the Warren '587 patent discloses a cargo handling system to place cargo load support elements in a fuselage of an aircraft and comprises a hoist mechanism supported by retractable support rails attached to the aircraft fuselage. The system according to Warren '587 is adapted to automatically place the load support elements within or remove the load support elements from the aircraft fuselage. The Warren '587 system is not portable and is relatively heavy and structurally complex.

The autonomous onboard loading system proposed by Dalbera '855 includes a hoisting means movable between the exterior and interior of the aircraft fuselage along carrier and guide means. The proposed guide means comprise transverse rails inside the fuselage at the level of the upper part of the lateral opening and two arms provided with rails movable between an extended position, wherein the arms extend outside the fuselage, and a retracted position, wherein the arms are withdrawn into the fuselage. Since the hoist system of Dalbera '855 is permanently fixed to the aircraft fuselage structure, it is not portable.

A portable hoist system is proposed by Spitsbergen '610 and comprises a hoist support assembly slidably mounted over a vertically oriented pintle fixed to the vehicle's structure. The hoist support assembly includes a substantially vertical tube which is connected at its top portion to a support arm, the latter being supported with respect to the former by means of an angled brace member. A lifting strap control assembly including a windlass and a guide bat are provided so as to lift loads. While the system proposed by Spitsbergen '610 is portable, the rather large pintle that is required for connected support with the vehicle is not entirely advantageous for use with an aircraft fuselage.

It would therefore be especially desirable to provide vehicular hoist systems especially adapted for use in the loading and unloading of cargo, baggage, equipment and like material into and out of a vehicle, especially an aircraft fuselage, which addresses the disadvantages noted above. It is towards fulfilling such needs that the present invention is directed.

SUMMARY OF EXEMPLARY EMBODIMENTS

Portable vehicular hoist systems according to preferred embodiments comprise a truss assembly which includes a joist member having forward and rearward ends, a pair of rafter members each having upper and lower ends, and a forward connection assembly for connecting the upper ends of the rafter members to the forward end of the joist member to allow for relative pivotal articulated movements therebetween. As such, the rafter members may be pivotally moved between a stowed condition wherein the rafter members are oriented generally parallel to the joist member and an operative position wherein the rafter members extend downwardly and laterally outwardly from the joist member. A hoist assembly is also preferably provided so as to be connectable to the joist member of the truss assembly to be supported thereby. The hoist assembly is sized and configured so as to be capable lifting and dropping loads as may be anticipated during use.

According to some embodiments, the forward connection assembly will preferably comprise a connection yoke positioned substantially transverse to the joist member, and a connection pin which connects the forward end of the joist member to the connection yoke for relative pivotal movements therebetween. The forward end of the joist member may include a forward connection tongue, and the connection yoke may include an elongate slot for receiving the forward connection tongue therein. A connection pin may therefore be provided so as to connect the connection yoke to the forward connection tongue received within the elongate slot thereof.

In a similar manner, certain preferred embodiments will also include upper connection tongues respectively provided with the upper ends of the rafter members. The forward connection yoke may therefore comprise an opposed pair of slotted support ears for receiving a respective one of the upper connection tongues of the rafter members. Connection pins may be provided for pivotally coupling the slotted support ears to the respective one of the upper connection tongues.

A carriage assembly moveably coupled to the joist member for reciprocal rectilinear translations relative thereto may be provided according to certain embodiments of the invention. In this regard, the carriage assembly may comprise a carriage yoke having a pair of laterally spaced apart yoke arms, a roller journally coupled to and extending between the yoke arms above the joist member, and a carriage lug depending from the yoke arms. The carriage lug may include an aperture to allow for attachment of the hoist assembly.

The portable hoist systems of the present invention may be employed with virtually any vehicle. In especially preferred embodiments, the hoist systems may be operatively associated with an aircraft having a fuselage, an opening in the fuselage, an upper connection lug rigidly fixed to an upper region of the fuselage opening, and a pair of side connection lugs rigidly fixed to respective lateral regions of the fuselage opening. A portable hoist system having a joist member and a pair of rafter members as described briefly above may therefore be connected to the upper and side connection lugs. Quick release pins may thus be provided so as to removably connect the rearward end of the joist member and/or the lower ends of the rafter members to their respective connection lug.

The hoist systems may be provided as a kit which comprises a case defining an interior space for containing the various components associated with the hoist systems during periods of non-use. In certain preferred embodiments, the case may include various internal dividers that will establish interior spaces therewithin for containing the hoist system components. In addition, various other auxiliary equipment may be provided within the case for use with the hoist system, for example, a frequency converter that converts input voltage from a source to the voltage required by the hoist motor associated with the hoist assembly. The various components may be protected within the case by conventional packing foam, tie down straps or the like to minimize movement of the components physically within the case and thereby minimize damage that may ensue from such movement.

These and other aspects and advantages of the present invention will become more clear after careful consideration is given to the following detailed description of the preferred exemplary embodiments thereof.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

The disclosed embodiments of the present invention will be better and more completely understood by referring to the following detailed description of exemplary non-limiting illustrative embodiments in conjunction with the drawings of which:

FIG. 1 is partial schematic perspective view of an aircraft equipped with a portable hoist system in accordance with a presently preferred embodiment according to the present invention;

FIG. 2 is an enlarged perspective view of the hoist system depicted in FIG. 1;

FIGS. 3-6 are enlarged perspective views of the subassemblies associated with the hoist system as shown in FIG. 2;

FIG. 7 is an enlarged schematic perspective view of a chain hoist subassembly that may be employed with the hoist system;

FIG. 8 is a schematic perspective view of a cargo net subassembly that may be employed with the hoist system; and

FIG. 9 is a partial cross-sectional perspective view of a portable storage unit that can provide storage for the components and subassemblies of the hoist system as depicted in FIGS. 1-8.

DETAILED DESCRIPTION

Accompanying FIG. 1 depicts schematically an aircraft AC having an opening FO on a side of the aircraft's fuselage AF. As is conventional, the opening may be closed for flight operations by means of a door FD hinged to the fuselage AF. A hoist system HS in accordance with an embodiment of the present invention is shown as being deployed in the opening FO in order to assist in the loading and unloading of cargo into the interior of the aircraft fuselage AF. Although the opening FO is depicted as being forward of the aircrafts wings AW, it should be appreciated that the hoist system HS may be employed in virtually any opening of the fuselage, e.g., behind, under or over the wings AW.

The hoist system HS is depicted in somewhat greater detail in accompanying FIGS. 2-6. In this regard, the hoist system HS is generally comprised of a truss assembly 10, and a hoist assembly 50. The truss assembly 10 is provided with a joist member 12 and a pair of rafter members 14 a, 14 b.

The forward end of the joist member 12 and the upper ends of the rafter members 14 a, 14 b are connected to one another at a junction node by means of an articulated connection assembly 16. As is perhaps more clearly depicted in FIG. 3, the connection assembly 16 is generally comprised of a forward connection yoke 18 positioned substantially transverse to the joist member 12. The connection yoke 18 most preferably includes downwardly and outwardly angled slotted support ears 18 a, 18 b at each opposed end thereof. The connection yoke 18 also defines an elongate central slot 18 c which receives a forward substantially planar connection tongue 12-1 projecting outwardly from the joist member 12. A connection pin 12-2 serves to connect the tongue 12-1 to the forward connection yoke 18 so as to allow for pivotal movements therebetween about axis A₁.

The upper ends of the rafter members 14 a, 14 b are provided with upper substantially planar connection tongues 14 a-1, 14 b-1 that are received by the slotted support ears 18 a, 18 b, respectively. Connection pins 15 a, 15 b connect each of the tongues 14 a-1, 14 b-1 to a slotted support ear 18 a, 18 b for relative pivotal movements therebetween about axes A₂ and A₃, respectively.

The rearward end of the joist member 12 is provided with a rearward connection assembly 20 while the lower ends of the rafter members 14 a, 14 b are provided with connection assemblies 22 a, 22 b, respectively. As shown in FIG. 4, the rearward connection assembly 20 is provided with a rearward connection yoke 24 having upwardly oriented slotted support ears 24 a, 24 b at each opposed end thereof. The connection yoke 24 also defines an elongate central slot 24 c which receives a rearward substantially planar connection tongue 12-3 projecting outwardly from the joist member 12. A connection pin 12-4 serves to connect the tongue 12-3 to the rearward connection yoke 24 so as to allow for pivotal movements therebetween about axis A₄.

The slotted support ears 24 a, 24 b of the rearward connection yoke 24 are adapted to being removably coupled to the downwardly projecting upper lugs 26 a, 26 b by means of quick release pins 28 a, 28 b, respectively. The rearward connection yoke 24, and hence the joist member 12, is therefore permitted some degree of pivotal movement relative to the lugs 26 a, 26 b about the axes A₅, A₆ established by the quick release pins 28 a, 28 b, respectively. The lugs 26 a, 26 b have attachment flanges 26 a-1, 26 b-1, respectively, which allow the lugs 26 a, 26 b to be immovably and rigidly fixed to the aircraft fuselage AF structure (e.g., via rivets, bolts, welding or the like) near an upper region of the opening FO.

The lower connection tongues 14 a-2, 14 b-2 associated with the rafter members 14 a, 14 b are similarly adapted to being removably coupled to side lugs 30 a, 30 b by means of quick release pins 32 a, 32 b, respectively. The side lugs 30 a, 30 b are adapted to being immovably and rigidly fixed to the aircraft fuselage AF structure (e.g., via rivets, bolts, welding or the like) near respective opposed lateral side regions of the opening FO.

Although the forward connection tongue 12-1 of the joist member 12 and the upper connection tongues 14 a-1, 14 b-1 of the rafter members 14 are have been depicted and described in relation to the presently preferred embodiment as maintaining the joist member 12 and rafter members 14 a, 14 b in a connected but relatively pivotally movable state, it is entirely conceivable that such component structures could be provided with quick release pins similar to pins 28 a, 28 b and 32 a, 32 b instead of the pins 12-2 and 15 a, 15 b. In such an alternatively, the joist member 12 and rafter members 14 a, 14 b would thus be maintained in an unconnected state from one another and assembled via the quick disconnect pins when an operator desires to deploy the hoist system HS.

The joist 12 includes a reciprocally movable carriage assembly 40 for dependently supporting the hoist assembly 50 and the load carried thereby. In this regard, the carriage assembly 40 includes a carriage yoke 42 having a pair of upwardly oriented and laterally spaced apart yoke arms 42 a, 42 b and a downwardly oriented carriage lug 42 c depending therefrom. A center tapered roller 44 is journeled to and spans between the upper ends of the carriage yoke arms 42 a, 42 b above the joist member 12. The journaling of the roller 44 to the yoke arms 42 a, 42 b thus allows for journeled movement of the roller 44 about shaft axis A₇ and thus reciprocal rectilinear rolling movement of the carriage assembly 40 along the length of the joist member 12. The carriage lug 42 c includes an aperture 42 c-1 to permit attachment of the hoist assembly 50 (e.g., via its attachment hook 52). As such, loads supported by the joist member 12 via the hoist assembly 50 may be moved the length of the former by virtue of the rolling movement of the carriage assembly 40.

Virtually any conventional hoist assembly 50 may be employed satisfactorily with the truss assembly 10 described above. Thus, manual, electric and pneumatic hoist assemblies may be employed. The hoist assembly 50 as depicted in FIG. 7 is a self-contained electric hoist having a hoist hook 52 attached to and extending upwardly from a hoist body 54. The hoist body 54 contains a reversible electric hoist motor (not shown) of adequate capacity for the contemplated loads and may be powered by the aircraft's onboard DC electrical power or by AC electrical power provided by an onboard or externally supplied generator (e.g., a conventional power cart). By way of example only, the hoist motor may be powered by an external rechargeable batter within container 55. A flexible lift strap 56 which in the embodiment shown is in the form of a chain, is dependently supported by the hoist body 54 and operably connected to the reversible motor (not shown) so that operation of the motor will either lift or drop the lift hook 58 (arrow A₈) at the terminal end of the lift strap 56. Direction control of the motor and hence the lift hook 58 is achieved by means of the hand-held controller 60 which is connected operably to the motor by means of suitable electrical control cables 62.

The lift hook 58 may be connected directly to a load (not shown) for manipulation. Alternatively, a cargo net 70 may be provided as depicted in accompanying FIG. 8. The exemplary cargo net 70 is in and of itself conventional in that it is constructed of strong and preferably lightweight cords 71 which are preferably made from synthetic material, e.g., polyolefin, nylon or the like filaments. The cords 71 are formed into a net structure by joining adjacent ones of the cords at their crossing points (e.g., by knotting, material fusion, crimping and the like). A number of net hooks (an exemplary few of which are identified by reference numeral 72) are positioned about the periphery of the net 70 so as to allow the net 70 to be gathered together and connected to the lift hook 58 of the hoist assembly 50. In such a manner, the net 70 will form a basket structure that will allow objects to be manipulated by the hoist assembly 50 in the manner described.

As noted previously, the hoist system HS is both portable (i.e., capable of being moved physically from one location to another within the aircraft AC and/or from one aircraft to another). In order to facilitate such portability of the hoist system HS, its various components are most preferable stowed in kit form within a suitable case 80 as depicted in FIG. 9. The case 80 will include various internal dividers 82 that will establish interior spaces therewithin for containing the hoist system HS components described previously. In addition, various other auxiliary equipment may be provided within the case 80 for use with the hoist system, for example, a frequency converter (not shown) that converts input voltage from a source to the voltage required by the hoist motor associated with the hoist assembly 50 (e.g., converting 220 VAC to 120 VAC and/or converting 120 VAC to 12 VDC). The various components may be protected within the case 80 by conventional packing foam, tie down straps or the like to minimize movement of the components physically within the case 80 and thereby minimize damage that may ensue from such movement.

In use, the lugs 26 a, 26 b and 30 a, 30 b will be prepositioned and rigidly fixed to the fuselage structure at the fuselage opening FO of the aircraft AC prior to the hoist system being deployed. Once the lugs 26 a, 26 b and 30 a, 30 b have been fixed to the aircraft AC at the opening FO, the hoist system HS may be deployed when needed. Thus, the truss assembly 10 may be unpacked from the case 80 and erected by articulating the joist member 12 and rafter members 14 a, 14 b relative to one another and relative to the lugs 26 a, 26 b and 30 a, 30 b.

Once proper alignment has been achieved with the 26 a, 26 b and 30 a, 30 b, the pins 28 a, 28 b and 32 a, 32 b may be inserted so as to removably but rigidly connect the truss 10 to the aircraft fuselage structure. If the carriage assembly 40 has been removed from the joist member 12, it must first be sleeved over the same prior to connection of the rearward connection assembly 20 to the lugs 26 a, 26 b by removal and then reattachment of the rearward connection yoke 24 to the joist member 12. However, it is contemplated that the carriage assembly will remain physically sleeved over the joist assembly 12 so as to prevent unneeded disassembly and to make the reassembly of the truss assembly 10 more efficient.

Thereafter, the joist assembly 50 may be coupled to the carriage lug 42 c by connection of the hook 52 with the lug aperture 42 c-1. The lift hook 58 may thus be connected directly to a load to be moved or to the hooks 72 associated with the cargo net 70 as may be needed. An operator may thus operate the controller 60 to lift or drop loads attached to the lift hook 58 so as to manipulate such loads during cargo loading and/or unloading operations of the aircraft AC.

The removal of the hoist system HS and its stowage is essentially opposite to that described above. That is, once the hoist assembly 50 and cargo net 70 have been removed, the quick release pins 28 a, 28 b and 32 a, 32 b may be removed from the lugs 26 a, 26 b and 30 a, 30 b so as to free the joist member 12 and the rafter members 14 a, 14 b, respectively. Thereafter, the joist member 12 and rafter members 14 a, 14 b may be pivotally articulated with respect to one another so that each such member is generally aligned parallel to one another for stowage within the case 80. The carriage assembly 40 may if desired be removed physically from the joist member 12 by simply rolling it to the rear end thereof once the tongue 12-3 has been disconnected from the rearward connection yoke 24.

The hoist system HS may be employed with a variety of vehicles including for example, trucks, cars, boats and the like. Thus, although the hoist system HS has been depicted as being associated operatively with an aircraft AC, it will be appreciated that such a depiction represents a presently preferred embodiment and is non-limiting with respect to the same.

Therefore, while the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope thereof. 

1. A portable vehicular hoist system comprising: a truss assembly which includes, (i) a joist member having forward and rearward ends, (ii) a pair of rafter members each having upper and lower ends, and (iii) a forward connection assembly for connecting the upper ends of the rafter members to the forward end of the joist member to allow for relative pivotal articulated movements therebetween so the rafter members may be pivotally moved between a stowed condition wherein the rafter members are oriented generally parallel to the joist member and an operative position wherein the rafter members extend downwardly and laterally outwardly from the joist member, and a hoist assembly connectable to the joist member of the truss assembly to be supported thereby and capable lifting and dropping loads.
 2. A portable vehicular hoist system as in claim 1, wherein the forward connection assembly comprises a connection yoke positioned substantially transverse to the joist member, and a connection pin which connects the forward end of the joist member to the connection yoke for relative pivotal movements therebetween.
 3. A portable vehicular hoist system as in claim 2, wherein the forward end of the joist member includes a forward connection tongue, and wherein the connection yoke includes an elongate slot for receiving the forward connection tongue therein, wherein the connection pin connects the connection yoke to the forward connection tongue received within the elongate slot thereof.
 4. A portable vehicular hoist system as in claim 3, wherein the upper ends of the rafter members include respective upper connection tongues.
 5. A portable vehicular hoist system as in claim 4, wherein the forward connection yoke comprises an opposed pair of slotted support ears for receiving a respective one of the upper connection tongues of the rafter members, and wherein the forward connection yoke further comprises connection pins for pivotally coupling the slotted support ears to the respective one of the upper connection tongues.
 6. A portable vehicular hoist system as in claim 1, wherein the truss system further comprises a forward connection yoke having an opposed pair of slotted support ears, and wherein the upper ends of the rafter members include respective upper connection tongues each received within a respective one of the slotted support ears, and connection pins for pivotally connecting the respective one of the slotted support ears to the upper connection tongues received therein.
 7. A portable vehicular hoist system as in claim 1, further comprising a carriage assembly moveably coupled to the joist member for reciprocal rectilinear translations relative thereto.
 8. A portable vehicular hoist system as in claim 7, wherein the carriage assembly comprises: a carriage yoke having a pair of laterally spaced apart yoke arms; a roller journally coupled to and extending between the yoke arms above the joist member, and a carriage lug depending from the yoke arms.
 9. A portable vehicular hoist system as in claim 8, wherein the carriage lug includes an aperture to allow for attachment of the hoist assembly.
 10. An aircraft which comprises: a fuselage; an opening in the fuselage; an upper connection lug rigidly fixed to an upper region of the fuselage opening; a pair of side connection lugs rigidly fixed to respective lateral regions of the fuselage opening; and a hoist system removably connected to the upper and side connection lugs, wherein the hoist system comprises, (i) a truss assembly having a joist member and a pair of rafter members connected to the joist member, and (ii) a hoist assembly connected to the joist member of the truss assembly to be supported thereby and capable of lifting and dropping loads relative to the fuselage opening, wherein (iii) the joist member has a rearward end removably attached to the upper connection lug, and wherein (iv) the rafter members have lower ends each of which is removably connected to a respective one of the side connection lugs.
 11. An aircraft as in claim 10, wherein the rearward end of the joist member includes a rearward connection assembly, and a quick release pin for removably connecting the rearward connection assembly to the upper connection lug.
 12. An aircraft as in claim 10, wherein each of the lower ends of the rafter members include a lower connection tongue, and a quick release pin for removably connecting the lower connection tongue to the respective one of the side connection lugs.
 13. An aircraft as in claim 10, wherein the truss assembly comprises a forward connection assembly for connecting upper ends of the rafter members to a forward end of the joist member to allow for relative pivotal articulated movements therebetween so the rafter members may be pivotally moved between a stowed condition when the truss assembly is removed from the upper and side lugs wherein the rafter members are oriented generally parallel to the joist member.
 14. An aircraft as in claim 13, wherein the forward connection assembly comprises a connection yoke positioned substantially transverse to the joist member, and a connection pin which connects the forward end of the joist member to the connection yoke for relative pivotal movements therebetween.
 15. An aircraft as in claim 14, wherein the forward end of the joist member includes a forward connection tongue, and wherein the connection yoke includes an elongate slot for receiving the forward connection tongue therein, wherein the connection pin connects the connection yoke to the forward connection tongue received within the elongate slot thereof.
 16. An aircraft as in claim 12, wherein the upper ends of the rafter members include respective upper connection tongues.
 17. An aircraft as in claim 16, wherein the truss assembly comprises a forward connection yoke positioned substantially transverse to the joist member, wherein the forward connection yoke comprises an opposed pair of slotted support ears for receiving a respective one of the upper connection tongues of the rafter members, and wherein the forward connection yoke further comprises connection pins for pivotally coupling the slotted support ears to the respective one of the upper connection tongues.
 18. An aircraft as in claim 10, wherein the truss system further comprises a forward connection yoke having an opposed pair of slotted support ears, and wherein the upper ends of the rafter members include respective upper planar connection tongues each received within a respective one of the slotted support ears, and connection pins for pivotally connecting the respective one of the slotted support ears to the upper connection tongues received therein.
 19. An aircraft as in claim 18, wherein the connection yoke comprises an elongate slot substantially transverse to the joist member, and wherein the joist member includes a forward planar connection tongue received within the elongate slot of the connection yoke, and a connection pin pivotally connecting the connection yoke to the forward connection tongue received within the elongate slot.
 20. An aircraft as in claim 10, wherein the truss assembly comprises a connection yoke having an elongate slot substantially transverse to the joist member, and wherein the joist member includes a forward planar connection tongue received within the elongate slot of the connection yoke, and a connection pin pivotally connecting the connection yoke to the forward connection tongue received within the elongate slot.
 21. An aircraft as in claim 10, wherein the hoist system further comprises a carriage assembly moveably coupled to the joist member for reciprocal rectilinear translations relative thereto.
 22. An aircraft as in claim 21, wherein the carriage assembly comprises: a carriage yoke having a pair of laterally spaced apart yoke arms; a roller journally coupled to and extending between the yoke arms above the joist member, and a carriage lug depending from the yoke arms.
 23. A kit comprising a case which defines an interior space, and arranged within the case a vehicular hoist system which comprises: a truss assembly adapted for removable connection to connection lugs rigidly attached to a vehicle, wherein the truss assembly includes, (i) a joist member having forward and rearward ends, (ii) a pair of rafter members each having upper and lower ends, and (iii) a forward connection assembly for connecting the upper ends of the rafter members to the forward end of the joist member to allow for relative pivotal articulated movements therebetween so the rafter members may be pivotally moved between a stowed condition wherein the rafter members are oriented generally parallel to the joist member and an operative position wherein the rafter members extend downwardly and laterally outwardly from the joist member, and a hoist assembly connectable to the joist member of the truss assembly to be supported thereby and capable lifting and dropping loads relative to the vehicle.
 24. The kit of claim 23, further comprising a cargo net adapted for attachment to the hoist assembly.
 25. The kit of claim 23, wherein the forward connection assembly comprises a connection yoke positioned substantially transverse to the joist member, and a connection pin which connects the forward end of the joist member to the connection yoke for relative pivotal movements therebetween.
 26. The kit of claim 25, wherein the forward end of the joist member includes a forward connection tongue, and wherein the connection yoke includes an elongate slot for receiving the forward connection tongue therein, wherein the connection pin connects the connection yoke to the forward connection tongue received within the elongate slot thereof.
 27. The kit of claim 26, wherein the upper ends of the rafter members include respective upper connection tongues.
 28. The kit of claim 27, wherein the forward connection yoke comprises an opposed pair of slotted support ears for receiving a respective one of the upper connection tongues of the rafter members, and wherein the forward connection yoke further comprises connection pins for pivotally coupling the slotted support ears to the respective one of the upper connection tongues.
 29. The kit of claim 23, wherein the truss system further comprises a forward connection yoke having an opposed pair of slotted support ears, and wherein the upper ends of the rafter members include respective upper connection tongues each received within a respective one of the slotted support ears, and connection pins for pivotally connecting the respective one of the slotted support ears to the upper connection tongues received therein.
 30. The kit of claim 23, further comprising a carriage assembly moveably coupled to the joist member for reciprocal rectilinear translations relative thereto.
 31. The kit of claim 30, wherein the carriage assembly comprises: a carriage yoke having a pair of laterally spaced apart yoke arms; a roller journally coupled to and extending between the yoke arms above the joist member, and a carriage lug depending from the yoke arms.
 32. The kit of claim 31, wherein the carriage lug includes an aperture to allow for attachment of the hoist assembly. 